Electrical Requirements And Precautions; Electrical Installation - Craftsman CMXTEPA0018 Instruction Manual

7. Electrical Requirements and Precautions

Manufacturer recommends that this product be installed in accordance with all applicable national, state, provincial, and local electrical
codes. Consult a qualified and licensed electrician if you have questions or are unsure about anything relating to codes for this product. The
heater must be connected to a dedicated circuit breaker on the main electrical panel.
WARNING: As with all electrical appliances, it's crucial to first shut off all power to the unit directly at the fuse or breaker box before
attempting to install, repair or disassemble this water heater. Ensure that the breaker is shut off. SERIOUS BODILY INJURY OR DEATH COULD
OCCUR IF YOU IGNORE THIS WARNING.
CAUTION: All wiring (wire gauge), as well as circuit protection (breaker), must comply with the U.S. National Electrical Code (NEC)
in the USA or the Canadian Electrical Code (CEC) in Canada. Failure to do so could lead to property damage, personal injury, and void your
warranty.
Note: The Canadian Electrical Code generally requires that all supply wires and corresponding circuit protection used for domestic hot water
heating and hydronic heating applications be sized to a minimum of 125% of the maximum current rating of the heater (check heater
specification details below).
Before installing this tankless water heater, ensure that sufficient electrical power is available in the home to handle the maximum
amperage load of the applicable heater.
IMPORTANT NOTES:
The heater requires set of wire and ground (see wiring diagram on page 10-11)
• Please see electrical specifications by heater input and wiring diagram on the page 10-11 for additional electrical information.

8. Electrical Installation

STEP 1: Take the wire pair and connect to the breaker (see wiring diagram). Be sure that the breaker is connected to one black wire and
one red wire. Be sure the power to the unit is shut off using the dedicated circuit breakers in the main electrical panel.
STEP 2: Run the correct set of power cable wires from the circuit breaker in the main electrical panel to the water heater by utilizing a
suitable wire gauge which meets all applicable electrical codes for the size of the breaker. Then, connect the power cable to the block
terminal within the water heater.
STEP 3: Unit requires a ground conductor for the incoming circuit.
STEP 4:
DOUBLE CHECK the electrical connections and ensure the wire connections are correct, tight and secure. It's important to
confirm that the right breaker size and wire gauge has been used and that the unit has been connected to a ground in accordance with
applicable codes. Be sure to reattach the front cover of the unit with two screws.
STEP 5: Ensure that all the air has been purged from the water lines before turning on power to the unit. Refer to STEP 3 in the plumbing
installation section. Restore power to the unit through the dedicated circuit breaker in the main electrical panel.
It is crucial to follow the wire connection as shown and ensure all connections are made correctly for proper operation of the
unit. The unit will not operate correctly, even though it turns on and otherwise appears to function, if you mix up one set of wire
with another.
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